Most people could care less what you are wearing:2c:. Some times it is possible to not see the bra strap, but by the way your back looks in you shirt or top it is possible to tell that there is something under the shirt or top. But I have noticed that more and more men are wearing undergarments that help with their posture. These undergarment can feel like a bra with it is actually a brace to help with posture.

I hope this made sense and helps.

Nancy